tcp_syncache.cache_limit is a per-cpu limit, reserve enough space for all
[dragonfly.git] / sys / net / if.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)if.c 8.3 (Berkeley) 1/4/94
f23061d4 34 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $
d2c71fa0 35 * $DragonFly: src/sys/net/if.c,v 1.42 2005/11/22 00:24:34 dillon Exp $
984263bc
MD
36 */
37
38#include "opt_compat.h"
39#include "opt_inet6.h"
40#include "opt_inet.h"
2b71c8f1 41#include "opt_polling.h"
984263bc
MD
42
43#include <sys/param.h>
44#include <sys/malloc.h>
45#include <sys/mbuf.h>
46#include <sys/systm.h>
47#include <sys/proc.h>
6b6e0885 48#include <sys/protosw.h>
984263bc
MD
49#include <sys/socket.h>
50#include <sys/socketvar.h>
6b6e0885 51#include <sys/socketops.h>
984263bc
MD
52#include <sys/protosw.h>
53#include <sys/kernel.h>
54#include <sys/sockio.h>
55#include <sys/syslog.h>
56#include <sys/sysctl.h>
698ac46c 57#include <sys/domain.h>
e9cb6d99 58#include <sys/thread.h>
984263bc
MD
59
60#include <net/if.h>
61#include <net/if_arp.h>
62#include <net/if_dl.h>
63#include <net/if_types.h>
64#include <net/if_var.h>
4d723e5a 65#include <net/ifq_var.h>
984263bc
MD
66#include <net/radix.h>
67#include <net/route.h>
68#include <machine/stdarg.h>
69
e9cb6d99
MD
70#include <sys/thread2.h>
71
984263bc
MD
72#if defined(INET) || defined(INET6)
73/*XXX*/
74#include <netinet/in.h>
75#include <netinet/in_var.h>
76#include <netinet/if_ether.h>
77#ifdef INET6
78#include <machine/clock.h> /* XXX: temporal workaround for fxp issue */
79#include <netinet6/in6_var.h>
80#include <netinet6/in6_ifattach.h>
81#endif
82#endif
83
9eee10d0
DRJ
84#if defined(COMPAT_43)
85#include <emulation/43bsd/43bsd_socket.h>
86#endif /* COMPAT_43 */
87
e3e4574a
JS
88/*
89 * Support for non-ALTQ interfaces.
90 */
91static int ifq_classic_enqueue(struct ifaltq *, struct mbuf *,
92 struct altq_pktattr *);
93static struct mbuf *
d2c71fa0 94 ifq_classic_dequeue(struct ifaltq *, struct mbuf *, int);
e3e4574a
JS
95static int ifq_classic_request(struct ifaltq *, int, void *);
96
984263bc
MD
97/*
98 * System initialization
99 */
100
698ac46c
HS
101static void if_attachdomain(void *);
102static void if_attachdomain1(struct ifnet *);
61b8d551 103static int ifconf (u_long, caddr_t, struct thread *);
158abb01 104static void ifinit (void *);
158abb01
RG
105static void if_slowtimo (void *);
106static void link_rtrequest (int, struct rtentry *, struct rt_addrinfo *);
107static int if_rtdel (struct radix_node *, void *);
984263bc
MD
108
109SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL)
110
111MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
112MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
b7b982e2 113MALLOC_DEFINE(M_CLONE, "clone", "interface cloning framework");
984263bc
MD
114
115int ifqmaxlen = IFQ_MAXLEN;
116struct ifnethead ifnet; /* depend on static init XXX */
117
118#ifdef INET6
119/*
120 * XXX: declare here to avoid to include many inet6 related files..
121 * should be more generalized?
122 */
158abb01 123extern void nd6_setmtu (struct ifnet *);
984263bc
MD
124#endif
125
158abb01
RG
126struct if_clone *if_clone_lookup (const char *, int *);
127int if_clone_list (struct if_clonereq *);
984263bc
MD
128
129LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
130int if_cloners_count;
131
abbb44bb
JS
132struct callout if_slowtimo_timer;
133
984263bc
MD
134/*
135 * Network interface utility routines.
136 *
137 * Routines with ifa_ifwith* names take sockaddr *'s as
138 * parameters.
139 */
140/* ARGSUSED*/
141void
f23061d4 142ifinit(void *dummy)
984263bc
MD
143{
144 struct ifnet *ifp;
984263bc 145
abbb44bb
JS
146 callout_init(&if_slowtimo_timer);
147
4986965b 148 crit_enter();
984263bc
MD
149 TAILQ_FOREACH(ifp, &ifnet, if_link) {
150 if (ifp->if_snd.ifq_maxlen == 0) {
3e4a09e7 151 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n");
984263bc
MD
152 ifp->if_snd.ifq_maxlen = ifqmaxlen;
153 }
154 }
4986965b 155 crit_exit();
abbb44bb 156
984263bc
MD
157 if_slowtimo(0);
158}
159
160int if_index = 0;
984263bc
MD
161struct ifnet **ifindex2ifnet = NULL;
162
984263bc
MD
163/*
164 * Attach an interface to the
165 * list of "active" interfaces.
166 */
167void
f23061d4 168if_attach(struct ifnet *ifp)
984263bc
MD
169{
170 unsigned socksize, ifasize;
171 int namelen, masklen;
82ed7fc2
RG
172 struct sockaddr_dl *sdl;
173 struct ifaddr *ifa;
e3e4574a 174 struct ifaltq *ifq;
590b8cd4 175
984263bc 176 static int if_indexlim = 8;
590b8cd4 177 static boolean_t inited;
984263bc
MD
178
179 if (!inited) {
180 TAILQ_INIT(&ifnet);
590b8cd4 181 inited = TRUE;
984263bc
MD
182 }
183
184 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
185 ifp->if_index = ++if_index;
186 /*
187 * XXX -
188 * The old code would work if the interface passed a pre-existing
189 * chain of ifaddrs to this code. We don't trust our callers to
190 * properly initialize the tailq, however, so we no longer allow
191 * this unlikely case.
192 */
193 TAILQ_INIT(&ifp->if_addrhead);
194 TAILQ_INIT(&ifp->if_prefixhead);
195 LIST_INIT(&ifp->if_multiaddrs);
196 getmicrotime(&ifp->if_lastchange);
141697b6 197 if (ifindex2ifnet == NULL || if_index >= if_indexlim) {
590b8cd4 198 unsigned int n;
141697b6 199 struct ifnet **q;
590b8cd4
JH
200
201 if_indexlim <<= 1;
984263bc
MD
202
203 /* grow ifindex2ifnet */
141697b6 204 n = if_indexlim * sizeof(*q);
590b8cd4 205 q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
984263bc 206 if (ifindex2ifnet) {
f23061d4
JH
207 bcopy(ifindex2ifnet, q, n/2);
208 free(ifindex2ifnet, M_IFADDR);
984263bc 209 }
141697b6 210 ifindex2ifnet = q;
984263bc
MD
211 }
212
213 ifindex2ifnet[if_index] = ifp;
214
215 /*
216 * create a Link Level name for this device
217 */
3e4a09e7 218 namelen = strlen(ifp->if_xname);
984263bc
MD
219#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
220 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
221 socksize = masklen + ifp->if_addrlen;
222#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
223 if (socksize < sizeof(*sdl))
224 socksize = sizeof(*sdl);
225 socksize = ROUNDUP(socksize);
590b8cd4
JH
226 ifasize = sizeof(struct ifaddr) + 2 * socksize;
227 ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
228 sdl = (struct sockaddr_dl *)(ifa + 1);
229 sdl->sdl_len = socksize;
230 sdl->sdl_family = AF_LINK;
231 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
232 sdl->sdl_nlen = namelen;
233 sdl->sdl_index = ifp->if_index;
234 sdl->sdl_type = ifp->if_type;
141697b6 235 ifp->if_lladdr = ifa;
590b8cd4
JH
236 ifa->ifa_ifp = ifp;
237 ifa->ifa_rtrequest = link_rtrequest;
238 ifa->ifa_addr = (struct sockaddr *)sdl;
239 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
240 ifa->ifa_netmask = (struct sockaddr *)sdl;
241 sdl->sdl_len = masklen;
242 while (namelen != 0)
243 sdl->sdl_data[--namelen] = 0xff;
244 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
984263bc 245
f2bd8b67
JS
246 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
247
e3e4574a
JS
248 ifq = &ifp->if_snd;
249 ifq->altq_type = 0;
250 ifq->altq_disc = NULL;
251 ifq->altq_flags &= ALTQF_CANTCHANGE;
252 ifq->altq_tbr = NULL;
253 ifq->altq_ifp = ifp;
b2f93efe 254 ifq_set_classic(ifq);
4d723e5a 255
9c70fe43 256 if (!SLIST_EMPTY(&domains))
698ac46c
HS
257 if_attachdomain1(ifp);
258
984263bc
MD
259 /* Announce the interface. */
260 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
261}
262
698ac46c
HS
263static void
264if_attachdomain(void *dummy)
265{
266 struct ifnet *ifp;
698ac46c 267
4986965b
JS
268 crit_enter();
269 TAILQ_FOREACH(ifp, &ifnet, if_list)
698ac46c 270 if_attachdomain1(ifp);
4986965b 271 crit_exit();
698ac46c
HS
272}
273SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST,
274 if_attachdomain, NULL);
275
276static void
277if_attachdomain1(struct ifnet *ifp)
278{
279 struct domain *dp;
698ac46c 280
4986965b 281 crit_enter();
698ac46c
HS
282
283 /* address family dependent data region */
284 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
9c70fe43 285 SLIST_FOREACH(dp, &domains, dom_next)
698ac46c
HS
286 if (dp->dom_ifattach)
287 ifp->if_afdata[dp->dom_family] =
288 (*dp->dom_ifattach)(ifp);
4986965b 289 crit_exit();
698ac46c
HS
290}
291
984263bc
MD
292/*
293 * Detach an interface, removing it from the
294 * list of "active" interfaces.
295 */
296void
f23061d4 297if_detach(struct ifnet *ifp)
984263bc
MD
298{
299 struct ifaddr *ifa;
300 struct radix_node_head *rnh;
984263bc 301 int i;
698ac46c 302 struct domain *dp;
984263bc 303
f2bd8b67
JS
304 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
305
984263bc
MD
306 /*
307 * Remove routes and flush queues.
308 */
4986965b 309 crit_enter();
323f031d 310#ifdef DEVICE_POLLING
9c095379
MD
311 if (ifp->if_flags & IFF_POLLING)
312 ether_poll_deregister(ifp);
323f031d 313#endif
984263bc
MD
314 if_down(ifp);
315
4d723e5a
JS
316 if (ifq_is_enabled(&ifp->if_snd))
317 altq_disable(&ifp->if_snd);
318 if (ifq_is_attached(&ifp->if_snd))
319 altq_detach(&ifp->if_snd);
320
984263bc 321 /*
984263bc
MD
322 * Clean up all addresses.
323 */
141697b6 324 ifp->if_lladdr = NULL;
984263bc
MD
325
326 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
327 ifa = TAILQ_FIRST(&ifp->if_addrhead)) {
328#ifdef INET
329 /* XXX: Ugly!! ad hoc just for INET */
330 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
331 struct ifaliasreq ifr;
332
f23061d4 333 bzero(&ifr, sizeof ifr);
984263bc
MD
334 ifr.ifra_addr = *ifa->ifa_addr;
335 if (ifa->ifa_dstaddr)
336 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
337 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
590b8cd4 338 NULL) == 0)
984263bc
MD
339 continue;
340 }
341#endif /* INET */
342#ifdef INET6
343 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
344 in6_purgeaddr(ifa);
345 /* ifp_addrhead is already updated */
346 continue;
347 }
348#endif /* INET6 */
349 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
350 IFAFREE(ifa);
351 }
352
a98eb818
JS
353#ifdef INET
354 /*
355 * Remove all IPv4 kernel structures related to ifp.
356 */
357 in_ifdetach(ifp);
358#endif
359
984263bc
MD
360#ifdef INET6
361 /*
362 * Remove all IPv6 kernel structs related to ifp. This should be done
363 * before removing routing entries below, since IPv6 interface direct
364 * routes are expected to be removed by the IPv6-specific kernel API.
365 * Otherwise, the kernel will detect some inconsistency and bark it.
366 */
367 in6_ifdetach(ifp);
368#endif
369
370 /*
371 * Delete all remaining routes using this interface
372 * Unfortuneatly the only way to do this is to slog through
373 * the entire routing table looking for routes which point
374 * to this interface...oh well...
375 */
376 for (i = 1; i <= AF_MAX; i++) {
377 if ((rnh = rt_tables[i]) == NULL)
378 continue;
f23061d4 379 rnh->rnh_walktree(rnh, if_rtdel, ifp);
984263bc
MD
380 }
381
382 /* Announce that the interface is gone. */
383 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
384
9c70fe43 385 SLIST_FOREACH(dp, &domains, dom_next)
698ac46c
HS
386 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
387 (*dp->dom_ifdetach)(ifp,
388 ifp->if_afdata[dp->dom_family]);
698ac46c 389
141697b6
JS
390 /*
391 * Remove interface from ifindex2ifp[] and maybe decrement if_index.
392 */
75857e7c 393 ifindex2ifnet[ifp->if_index] = NULL;
141697b6
JS
394 while (if_index > 0 && ifindex2ifnet[if_index] == NULL)
395 if_index--;
75857e7c 396
984263bc 397 TAILQ_REMOVE(&ifnet, ifp, if_link);
4986965b 398 crit_exit();
984263bc
MD
399}
400
401/*
402 * Delete Routes for a Network Interface
f23061d4 403 *
984263bc
MD
404 * Called for each routing entry via the rnh->rnh_walktree() call above
405 * to delete all route entries referencing a detaching network interface.
406 *
407 * Arguments:
408 * rn pointer to node in the routing table
409 * arg argument passed to rnh->rnh_walktree() - detaching interface
410 *
411 * Returns:
412 * 0 successful
413 * errno failed - reason indicated
414 *
415 */
416static int
f23061d4 417if_rtdel(struct radix_node *rn, void *arg)
984263bc
MD
418{
419 struct rtentry *rt = (struct rtentry *)rn;
420 struct ifnet *ifp = arg;
421 int err;
422
423 if (rt->rt_ifp == ifp) {
424
425 /*
426 * Protect (sorta) against walktree recursion problems
427 * with cloned routes
428 */
f23061d4 429 if (!(rt->rt_flags & RTF_UP))
984263bc
MD
430 return (0);
431
432 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
433 rt_mask(rt), rt->rt_flags,
434 (struct rtentry **) NULL);
435 if (err) {
436 log(LOG_WARNING, "if_rtdel: error %d\n", err);
437 }
438 }
439
440 return (0);
441}
442
443/*
444 * Create a clone network interface.
445 */
446int
f23061d4 447if_clone_create(char *name, int len)
984263bc
MD
448{
449 struct if_clone *ifc;
450 char *dp;
b7b982e2 451 int wildcard, bytoff, bitoff;
984263bc
MD
452 int unit;
453 int err;
454
455 ifc = if_clone_lookup(name, &unit);
456 if (ifc == NULL)
457 return (EINVAL);
458
459 if (ifunit(name) != NULL)
460 return (EEXIST);
461
b7b982e2 462 bytoff = bitoff = 0;
984263bc 463 wildcard = (unit < 0);
b7b982e2
MD
464 /*
465 * Find a free unit if none was given.
466 */
467 if (wildcard) {
f23061d4
JH
468 while (bytoff < ifc->ifc_bmlen &&
469 ifc->ifc_units[bytoff] == 0xff)
b7b982e2
MD
470 bytoff++;
471 if (bytoff >= ifc->ifc_bmlen)
472 return (ENOSPC);
473 while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
474 bitoff++;
475 unit = (bytoff << 3) + bitoff;
476 }
984263bc 477
b7b982e2
MD
478 if (unit > ifc->ifc_maxunit)
479 return (ENXIO);
480
481 err = (*ifc->ifc_create)(ifc, unit);
984263bc
MD
482 if (err != 0)
483 return (err);
484
b7b982e2
MD
485 if (!wildcard) {
486 bytoff = unit >> 3;
487 bitoff = unit - (bytoff << 3);
488 }
489
490 /*
491 * Allocate the unit in the bitmap.
492 */
493 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0,
494 ("%s: bit is already set", __func__));
495 ifc->ifc_units[bytoff] |= (1 << bitoff);
496
984263bc
MD
497 /* In the wildcard case, we need to update the name. */
498 if (wildcard) {
499 for (dp = name; *dp != '\0'; dp++);
500 if (snprintf(dp, len - (dp-name), "%d", unit) >
501 len - (dp-name) - 1) {
502 /*
503 * This can only be a programmer error and
504 * there's no straightforward way to recover if
505 * it happens.
506 */
507 panic("if_clone_create(): interface name too long");
508 }
b7b982e2 509
984263bc
MD
510 }
511
f2bd8b67
JS
512 EVENTHANDLER_INVOKE(if_clone_event, ifc);
513
984263bc
MD
514 return (0);
515}
516
517/*
518 * Destroy a clone network interface.
519 */
520int
f23061d4 521if_clone_destroy(const char *name)
984263bc
MD
522{
523 struct if_clone *ifc;
524 struct ifnet *ifp;
b7b982e2
MD
525 int bytoff, bitoff;
526 int unit;
984263bc 527
b7b982e2 528 ifc = if_clone_lookup(name, &unit);
984263bc
MD
529 if (ifc == NULL)
530 return (EINVAL);
531
b7b982e2
MD
532 if (unit < ifc->ifc_minifs)
533 return (EINVAL);
534
984263bc
MD
535 ifp = ifunit(name);
536 if (ifp == NULL)
537 return (ENXIO);
538
539 if (ifc->ifc_destroy == NULL)
540 return (EOPNOTSUPP);
541
542 (*ifc->ifc_destroy)(ifp);
b7b982e2
MD
543
544 /*
545 * Compute offset in the bitmap and deallocate the unit.
546 */
547 bytoff = unit >> 3;
548 bitoff = unit - (bytoff << 3);
549 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0,
550 ("%s: bit is already cleared", __func__));
551 ifc->ifc_units[bytoff] &= ~(1 << bitoff);
984263bc
MD
552 return (0);
553}
554
555/*
556 * Look up a network interface cloner.
557 */
558struct if_clone *
f23061d4 559if_clone_lookup(const char *name, int *unitp)
984263bc
MD
560{
561 struct if_clone *ifc;
562 const char *cp;
563 int i;
564
565 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
566 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
567 if (ifc->ifc_name[i] != *cp)
568 goto next_ifc;
569 }
570 goto found_name;
571 next_ifc:
572 ifc = LIST_NEXT(ifc, ifc_list);
573 }
574
575 /* No match. */
576 return ((struct if_clone *)NULL);
577
578 found_name:
579 if (*cp == '\0') {
580 i = -1;
581 } else {
582 for (i = 0; *cp != '\0'; cp++) {
583 if (*cp < '0' || *cp > '9') {
584 /* Bogus unit number. */
585 return (NULL);
586 }
587 i = (i * 10) + (*cp - '0');
588 }
589 }
590
591 if (unitp != NULL)
592 *unitp = i;
593 return (ifc);
594}
595
596/*
597 * Register a network interface cloner.
598 */
599void
f23061d4 600if_clone_attach(struct if_clone *ifc)
984263bc 601{
b7b982e2
MD
602 int bytoff, bitoff;
603 int err;
604 int len, maxclone;
605 int unit;
606
607 KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit,
608 ("%s: %s requested more units then allowed (%d > %d)",
609 __func__, ifc->ifc_name, ifc->ifc_minifs,
610 ifc->ifc_maxunit + 1));
611 /*
612 * Compute bitmap size and allocate it.
613 */
614 maxclone = ifc->ifc_maxunit + 1;
615 len = maxclone >> 3;
616 if ((len << 3) < maxclone)
617 len++;
618 ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO);
619 ifc->ifc_bmlen = len;
984263bc
MD
620
621 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
622 if_cloners_count++;
b7b982e2
MD
623
624 for (unit = 0; unit < ifc->ifc_minifs; unit++) {
625 err = (*ifc->ifc_create)(ifc, unit);
626 KASSERT(err == 0,
627 ("%s: failed to create required interface %s%d",
628 __func__, ifc->ifc_name, unit));
629
630 /* Allocate the unit in the bitmap. */
631 bytoff = unit >> 3;
632 bitoff = unit - (bytoff << 3);
633 ifc->ifc_units[bytoff] |= (1 << bitoff);
634 }
984263bc
MD
635}
636
637/*
638 * Unregister a network interface cloner.
639 */
640void
f23061d4 641if_clone_detach(struct if_clone *ifc)
984263bc
MD
642{
643
644 LIST_REMOVE(ifc, ifc_list);
b7b982e2 645 free(ifc->ifc_units, M_CLONE);
984263bc
MD
646 if_cloners_count--;
647}
648
649/*
650 * Provide list of interface cloners to userspace.
651 */
652int
f23061d4 653if_clone_list(struct if_clonereq *ifcr)
984263bc
MD
654{
655 char outbuf[IFNAMSIZ], *dst;
656 struct if_clone *ifc;
657 int count, error = 0;
658
659 ifcr->ifcr_total = if_cloners_count;
660 if ((dst = ifcr->ifcr_buffer) == NULL) {
661 /* Just asking how many there are. */
662 return (0);
663 }
664
665 if (ifcr->ifcr_count < 0)
666 return (EINVAL);
667
668 count = (if_cloners_count < ifcr->ifcr_count) ?
669 if_cloners_count : ifcr->ifcr_count;
670
671 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
672 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
3e4a09e7 673 strlcpy(outbuf, ifc->ifc_name, IFNAMSIZ);
984263bc
MD
674 error = copyout(outbuf, dst, IFNAMSIZ);
675 if (error)
676 break;
677 }
678
679 return (error);
680}
681
682/*
683 * Locate an interface based on a complete address.
684 */
984263bc 685struct ifaddr *
f23061d4 686ifa_ifwithaddr(struct sockaddr *addr)
984263bc 687{
82ed7fc2
RG
688 struct ifnet *ifp;
689 struct ifaddr *ifa;
984263bc 690
984263bc
MD
691 TAILQ_FOREACH(ifp, &ifnet, if_link)
692 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
693 if (ifa->ifa_addr->sa_family != addr->sa_family)
694 continue;
0c3c561c 695 if (sa_equal(addr, ifa->ifa_addr))
984263bc
MD
696 return (ifa);
697 if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
0c3c561c 698 /* IPv6 doesn't have broadcast */
984263bc 699 ifa->ifa_broadaddr->sa_len != 0 &&
0c3c561c 700 sa_equal(ifa->ifa_broadaddr, addr))
984263bc
MD
701 return (ifa);
702 }
0c3c561c 703 return ((struct ifaddr *)NULL);
984263bc
MD
704}
705/*
706 * Locate the point to point interface with a given destination address.
707 */
984263bc 708struct ifaddr *
f23061d4 709ifa_ifwithdstaddr(struct sockaddr *addr)
984263bc 710{
82ed7fc2
RG
711 struct ifnet *ifp;
712 struct ifaddr *ifa;
984263bc
MD
713
714 TAILQ_FOREACH(ifp, &ifnet, if_link)
715 if (ifp->if_flags & IFF_POINTOPOINT)
716 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
717 if (ifa->ifa_addr->sa_family != addr->sa_family)
718 continue;
0c3c561c
JH
719 if (ifa->ifa_dstaddr &&
720 sa_equal(addr, ifa->ifa_dstaddr))
984263bc
MD
721 return (ifa);
722 }
0c3c561c 723 return ((struct ifaddr *)NULL);
984263bc
MD
724}
725
726/*
727 * Find an interface on a specific network. If many, choice
728 * is most specific found.
729 */
730struct ifaddr *
f23061d4 731ifa_ifwithnet(struct sockaddr *addr)
984263bc 732{
82ed7fc2
RG
733 struct ifnet *ifp;
734 struct ifaddr *ifa;
984263bc
MD
735 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
736 u_int af = addr->sa_family;
737 char *addr_data = addr->sa_data, *cplim;
738
739 /*
740 * AF_LINK addresses can be looked up directly by their index number,
741 * so do that if we can.
742 */
743 if (af == AF_LINK) {
82ed7fc2 744 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
590b8cd4 745
984263bc 746 if (sdl->sdl_index && sdl->sdl_index <= if_index)
141697b6 747 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr);
984263bc
MD
748 }
749
750 /*
751 * Scan though each interface, looking for ones that have
752 * addresses in this address family.
753 */
754 TAILQ_FOREACH(ifp, &ifnet, if_link) {
755 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
82ed7fc2 756 char *cp, *cp2, *cp3;
984263bc
MD
757
758 if (ifa->ifa_addr->sa_family != af)
759next: continue;
760 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
761 /*
762 * This is a bit broken as it doesn't
763 * take into account that the remote end may
764 * be a single node in the network we are
765 * looking for.
766 * The trouble is that we don't know the
767 * netmask for the remote end.
768 */
0c3c561c
JH
769 if (ifa->ifa_dstaddr != NULL &&
770 sa_equal(addr, ifa->ifa_dstaddr))
f23061d4 771 return (ifa);
984263bc
MD
772 } else {
773 /*
774 * if we have a special address handler,
775 * then use it instead of the generic one.
776 */
f23061d4 777 if (ifa->ifa_claim_addr) {
984263bc
MD
778 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
779 return (ifa);
780 } else {
781 continue;
782 }
783 }
784
785 /*
786 * Scan all the bits in the ifa's address.
787 * If a bit dissagrees with what we are
788 * looking for, mask it with the netmask
789 * to see if it really matters.
790 * (A byte at a time)
791 */
792 if (ifa->ifa_netmask == 0)
793 continue;
794 cp = addr_data;
795 cp2 = ifa->ifa_addr->sa_data;
796 cp3 = ifa->ifa_netmask->sa_data;
590b8cd4
JH
797 cplim = ifa->ifa_netmask->sa_len +
798 (char *)ifa->ifa_netmask;
984263bc
MD
799 while (cp3 < cplim)
800 if ((*cp++ ^ *cp2++) & *cp3++)
801 goto next; /* next address! */
802 /*
803 * If the netmask of what we just found
804 * is more specific than what we had before
805 * (if we had one) then remember the new one
806 * before continuing to search
807 * for an even better one.
808 */
809 if (ifa_maybe == 0 ||
f23061d4
JH
810 rn_refines((char *)ifa->ifa_netmask,
811 (char *)ifa_maybe->ifa_netmask))
984263bc
MD
812 ifa_maybe = ifa;
813 }
814 }
815 }
816 return (ifa_maybe);
817}
818
819/*
820 * Find an interface address specific to an interface best matching
821 * a given address.
822 */
823struct ifaddr *
f23061d4 824ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
984263bc 825{
82ed7fc2
RG
826 struct ifaddr *ifa;
827 char *cp, *cp2, *cp3;
828 char *cplim;
984263bc
MD
829 struct ifaddr *ifa_maybe = 0;
830 u_int af = addr->sa_family;
831
832 if (af >= AF_MAX)
833 return (0);
834 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
835 if (ifa->ifa_addr->sa_family != af)
836 continue;
837 if (ifa_maybe == 0)
838 ifa_maybe = ifa;
0c3c561c
JH
839 if (ifa->ifa_netmask == NULL) {
840 if (sa_equal(addr, ifa->ifa_addr) ||
841 (ifa->ifa_dstaddr != NULL &&
842 sa_equal(addr, ifa->ifa_dstaddr)))
984263bc
MD
843 return (ifa);
844 continue;
845 }
846 if (ifp->if_flags & IFF_POINTOPOINT) {
0c3c561c 847 if (sa_equal(addr, ifa->ifa_dstaddr))
984263bc
MD
848 return (ifa);
849 } else {
850 cp = addr->sa_data;
851 cp2 = ifa->ifa_addr->sa_data;
852 cp3 = ifa->ifa_netmask->sa_data;
853 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
854 for (; cp3 < cplim; cp3++)
855 if ((*cp++ ^ *cp2++) & *cp3)
856 break;
857 if (cp3 == cplim)
858 return (ifa);
859 }
860 }
861 return (ifa_maybe);
862}
863
864#include <net/route.h>
865
866/*
867 * Default action when installing a route with a Link Level gateway.
868 * Lookup an appropriate real ifa to point to.
869 * This should be moved to /sys/net/link.c eventually.
870 */
871static void
f23061d4 872link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
984263bc 873{
82ed7fc2 874 struct ifaddr *ifa;
984263bc
MD
875 struct sockaddr *dst;
876 struct ifnet *ifp;
877
f23061d4
JH
878 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
879 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
984263bc
MD
880 return;
881 ifa = ifaof_ifpforaddr(dst, ifp);
f23061d4 882 if (ifa != NULL) {
984263bc 883 IFAFREE(rt->rt_ifa);
f23061d4 884 IFAREF(ifa);
984263bc 885 rt->rt_ifa = ifa;
984263bc
MD
886 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
887 ifa->ifa_rtrequest(cmd, rt, info);
888 }
889}
890
891/*
892 * Mark an interface down and notify protocols of
893 * the transition.
894 * NOTE: must be called at splnet or eqivalent.
895 */
896void
f23061d4 897if_unroute(struct ifnet *ifp, int flag, int fam)
984263bc 898{
82ed7fc2 899 struct ifaddr *ifa;
984263bc
MD
900
901 ifp->if_flags &= ~flag;
902 getmicrotime(&ifp->if_lastchange);
903 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
904 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
905 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
4d723e5a 906 ifq_purge(&ifp->if_snd);
984263bc
MD
907 rt_ifmsg(ifp);
908}
909
910/*
911 * Mark an interface up and notify protocols of
912 * the transition.
913 * NOTE: must be called at splnet or eqivalent.
914 */
915void
f23061d4 916if_route(struct ifnet *ifp, int flag, int fam)
984263bc 917{
82ed7fc2 918 struct ifaddr *ifa;
984263bc
MD
919
920 ifp->if_flags |= flag;
921 getmicrotime(&ifp->if_lastchange);
922 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
923 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
924 pfctlinput(PRC_IFUP, ifa->ifa_addr);
925 rt_ifmsg(ifp);
926#ifdef INET6
927 in6_if_up(ifp);
928#endif
929}
930
931/*
5c703385
MD
932 * Mark an interface down and notify protocols of the transition. An
933 * interface going down is also considered to be a synchronizing event.
934 * We must ensure that all packet processing related to the interface
935 * has completed before we return so e.g. the caller can free the ifnet
936 * structure that the mbufs may be referencing.
937 *
984263bc
MD
938 * NOTE: must be called at splnet or eqivalent.
939 */
940void
f23061d4 941if_down(struct ifnet *ifp)
984263bc 942{
984263bc 943 if_unroute(ifp, IFF_UP, AF_UNSPEC);
5c703385 944 netmsg_service_sync();
984263bc
MD
945}
946
947/*
948 * Mark an interface up and notify protocols of
949 * the transition.
950 * NOTE: must be called at splnet or eqivalent.
951 */
952void
f23061d4 953if_up(struct ifnet *ifp)
984263bc
MD
954{
955
956 if_route(ifp, IFF_UP, AF_UNSPEC);
957}
958
984263bc
MD
959/*
960 * Handle interface watchdog timer routines. Called
961 * from softclock, we decrement timers (if set) and
962 * call the appropriate interface routine on expiration.
963 */
964static void
f23061d4 965if_slowtimo(void *arg)
984263bc 966{
82ed7fc2 967 struct ifnet *ifp;
4986965b
JS
968
969 crit_enter();
984263bc
MD
970
971 TAILQ_FOREACH(ifp, &ifnet, if_link) {
972 if (ifp->if_timer == 0 || --ifp->if_timer)
973 continue;
974 if (ifp->if_watchdog)
975 (*ifp->if_watchdog)(ifp);
976 }
4986965b
JS
977
978 crit_exit();
979
abbb44bb 980 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
984263bc
MD
981}
982
983/*
984 * Map interface name to
985 * interface structure pointer.
986 */
987struct ifnet *
988ifunit(const char *name)
989{
984263bc 990 struct ifnet *ifp;
984263bc 991
984263bc 992 /*
3e4a09e7 993 * Search all the interfaces for this name/number
984263bc 994 */
3e4a09e7 995
984263bc 996 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 997 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
984263bc
MD
998 break;
999 }
1000 return (ifp);
1001}
1002
1003
1004/*
1005 * Map interface name in a sockaddr_dl to
1006 * interface structure pointer.
1007 */
1008struct ifnet *
f23061d4 1009if_withname(struct sockaddr *sa)
984263bc
MD
1010{
1011 char ifname[IFNAMSIZ+1];
1012 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1013
1014 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1015 (sdl->sdl_nlen > IFNAMSIZ) )
1016 return NULL;
1017
1018 /*
1019 * ifunit wants a null-terminated name. It may not be null-terminated
1020 * in the sockaddr. We don't want to change the caller's sockaddr,
1021 * and there might not be room to put the trailing null anyway, so we
1022 * make a local copy that we know we can null terminate safely.
1023 */
1024
1025 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1026 ifname[sdl->sdl_nlen] = '\0';
1027 return ifunit(ifname);
1028}
1029
1030
1031/*
1032 * Interface ioctls.
1033 */
1034int
dadab5e9 1035ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
984263bc 1036{
41c20dac
MD
1037 struct ifnet *ifp;
1038 struct ifreq *ifr;
984263bc
MD
1039 struct ifstat *ifs;
1040 int error;
1041 short oif_flags;
1042 int new_flags;
1fdf0954
HP
1043 size_t namelen, onamelen;
1044 char new_name[IFNAMSIZ];
1045 struct ifaddr *ifa;
1046 struct sockaddr_dl *sdl;
984263bc
MD
1047
1048 switch (cmd) {
1049
1050 case SIOCGIFCONF:
1051 case OSIOCGIFCONF:
61b8d551 1052 return (ifconf(cmd, data, td));
984263bc
MD
1053 }
1054 ifr = (struct ifreq *)data;
1055
1056 switch (cmd) {
1057 case SIOCIFCREATE:
1058 case SIOCIFDESTROY:
dadab5e9 1059 if ((error = suser(td)) != 0)
984263bc
MD
1060 return (error);
1061 return ((cmd == SIOCIFCREATE) ?
1062 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1063 if_clone_destroy(ifr->ifr_name));
f23061d4 1064
984263bc
MD
1065 case SIOCIFGCLONERS:
1066 return (if_clone_list((struct if_clonereq *)data));
1067 }
1068
1069 ifp = ifunit(ifr->ifr_name);
1070 if (ifp == 0)
1071 return (ENXIO);
1072 switch (cmd) {
1073
1074 case SIOCGIFFLAGS:
1075 ifr->ifr_flags = ifp->if_flags;
46f25451 1076 ifr->ifr_flagshigh = ifp->if_flags >> 16;
984263bc
MD
1077 break;
1078
1079 case SIOCGIFCAP:
1080 ifr->ifr_reqcap = ifp->if_capabilities;
1081 ifr->ifr_curcap = ifp->if_capenable;
1082 break;
1083
1084 case SIOCGIFMETRIC:
1085 ifr->ifr_metric = ifp->if_metric;
1086 break;
1087
1088 case SIOCGIFMTU:
1089 ifr->ifr_mtu = ifp->if_mtu;
1090 break;
1091
1092 case SIOCGIFPHYS:
1093 ifr->ifr_phys = ifp->if_physical;
1094 break;
1095
1096 case SIOCSIFFLAGS:
dadab5e9 1097 error = suser(td);
984263bc
MD
1098 if (error)
1099 return (error);
1100 new_flags = (ifr->ifr_flags & 0xffff) |
1101 (ifr->ifr_flagshigh << 16);
1102 if (ifp->if_flags & IFF_SMART) {
1103 /* Smart drivers twiddle their own routes */
1104 } else if (ifp->if_flags & IFF_UP &&
1105 (new_flags & IFF_UP) == 0) {
4986965b 1106 crit_enter();
984263bc 1107 if_down(ifp);
4986965b 1108 crit_exit();
984263bc
MD
1109 } else if (new_flags & IFF_UP &&
1110 (ifp->if_flags & IFF_UP) == 0) {
4986965b 1111 crit_enter();
984263bc 1112 if_up(ifp);
4986965b 1113 crit_exit();
984263bc 1114 }
9c095379
MD
1115
1116#ifdef DEVICE_POLLING
1117 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) {
1118 if (new_flags & IFF_POLLING) {
1119 ether_poll_register(ifp);
1120 } else {
1121 ether_poll_deregister(ifp);
1122 }
1123 }
1124#endif
1125
984263bc
MD
1126 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1127 (new_flags &~ IFF_CANTCHANGE);
984263bc
MD
1128 if (new_flags & IFF_PPROMISC) {
1129 /* Permanently promiscuous mode requested */
1130 ifp->if_flags |= IFF_PROMISC;
1131 } else if (ifp->if_pcount == 0) {
1132 ifp->if_flags &= ~IFF_PROMISC;
1133 }
1134 if (ifp->if_ioctl)
f23061d4 1135 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1136 getmicrotime(&ifp->if_lastchange);
1137 break;
1138
1139 case SIOCSIFCAP:
dadab5e9 1140 error = suser(td);
984263bc
MD
1141 if (error)
1142 return (error);
1143 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1144 return (EINVAL);
f23061d4 1145 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1146 break;
1147
f23061d4
JH
1148 case SIOCSIFNAME:
1149 error = suser(td);
1150 if (error != 0)
1151 return (error);
1152 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1153 if (error != 0)
1154 return (error);
1fdf0954
HP
1155 if (new_name[0] == '\0')
1156 return (EINVAL);
f23061d4
JH
1157 if (ifunit(new_name) != NULL)
1158 return (EEXIST);
f2bd8b67
JS
1159
1160 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
f23061d4
JH
1161
1162 /* Announce the departure of the interface. */
1163 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1164
1165 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1166 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1167 /* XXX IFA_LOCK(ifa); */
1168 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1169 namelen = strlen(new_name);
1170 onamelen = sdl->sdl_nlen;
1171 /*
1172 * Move the address if needed. This is safe because we
1173 * allocate space for a name of length IFNAMSIZ when we
1174 * create this in if_attach().
1175 */
1176 if (namelen != onamelen) {
1177 bcopy(sdl->sdl_data + onamelen,
1178 sdl->sdl_data + namelen, sdl->sdl_alen);
1179 }
1180 bcopy(new_name, sdl->sdl_data, namelen);
1181 sdl->sdl_nlen = namelen;
1182 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1183 bzero(sdl->sdl_data, onamelen);
1184 while (namelen != 0)
1185 sdl->sdl_data[--namelen] = 0xff;
1186 /* XXX IFA_UNLOCK(ifa) */
f2bd8b67
JS
1187
1188 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
f23061d4
JH
1189
1190 /* Announce the return of the interface. */
1191 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1192 break;
1fdf0954 1193
984263bc 1194 case SIOCSIFMETRIC:
dadab5e9 1195 error = suser(td);
984263bc
MD
1196 if (error)
1197 return (error);
1198 ifp->if_metric = ifr->ifr_metric;
1199 getmicrotime(&ifp->if_lastchange);
1200 break;
1201
1202 case SIOCSIFPHYS:
dadab5e9 1203 error = suser(td);
984263bc
MD
1204 if (error)
1205 return error;
1206 if (!ifp->if_ioctl)
1207 return EOPNOTSUPP;
bd4539cc 1208 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1209 if (error == 0)
1210 getmicrotime(&ifp->if_lastchange);
f23061d4 1211 return (error);
984263bc
MD
1212
1213 case SIOCSIFMTU:
1214 {
1215 u_long oldmtu = ifp->if_mtu;
1216
dadab5e9 1217 error = suser(td);
984263bc
MD
1218 if (error)
1219 return (error);
1220 if (ifp->if_ioctl == NULL)
1221 return (EOPNOTSUPP);
1222 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1223 return (EINVAL);
bd4539cc 1224 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1225 if (error == 0) {
1226 getmicrotime(&ifp->if_lastchange);
1227 rt_ifmsg(ifp);
1228 }
1229 /*
1230 * If the link MTU changed, do network layer specific procedure.
1231 */
1232 if (ifp->if_mtu != oldmtu) {
1233#ifdef INET6
1234 nd6_setmtu(ifp);
1235#endif
1236 }
1237 return (error);
1238 }
1239
1240 case SIOCADDMULTI:
1241 case SIOCDELMULTI:
dadab5e9 1242 error = suser(td);
984263bc
MD
1243 if (error)
1244 return (error);
1245
1246 /* Don't allow group membership on non-multicast interfaces. */
1247 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1248 return EOPNOTSUPP;
1249
1250 /* Don't let users screw up protocols' entries. */
1251 if (ifr->ifr_addr.sa_family != AF_LINK)
1252 return EINVAL;
1253
1254 if (cmd == SIOCADDMULTI) {
1255 struct ifmultiaddr *ifma;
1256 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1257 } else {
1258 error = if_delmulti(ifp, &ifr->ifr_addr);
1259 }
1260 if (error == 0)
1261 getmicrotime(&ifp->if_lastchange);
1262 return error;
1263
1264 case SIOCSIFPHYADDR:
1265 case SIOCDIFPHYADDR:
1266#ifdef INET6
1267 case SIOCSIFPHYADDR_IN6:
1268#endif
1269 case SIOCSLIFPHYADDR:
1270 case SIOCSIFMEDIA:
1271 case SIOCSIFGENERIC:
dadab5e9 1272 error = suser(td);
984263bc
MD
1273 if (error)
1274 return (error);
1275 if (ifp->if_ioctl == 0)
1276 return (EOPNOTSUPP);
bd4539cc 1277 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1278 if (error == 0)
1279 getmicrotime(&ifp->if_lastchange);
1280 return error;
1281
1282 case SIOCGIFSTATUS:
1283 ifs = (struct ifstat *)data;
1284 ifs->ascii[0] = '\0';
f23061d4 1285
984263bc
MD
1286 case SIOCGIFPSRCADDR:
1287 case SIOCGIFPDSTADDR:
1288 case SIOCGLIFPHYADDR:
1289 case SIOCGIFMEDIA:
1290 case SIOCGIFGENERIC:
1291 if (ifp->if_ioctl == 0)
1292 return (EOPNOTSUPP);
bd4539cc 1293 return ((*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred));
984263bc
MD
1294
1295 case SIOCSIFLLADDR:
dadab5e9 1296 error = suser(td);
984263bc
MD
1297 if (error)
1298 return (error);
1299 return if_setlladdr(ifp,
1300 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1301
1302 default:
1303 oif_flags = ifp->if_flags;
1304 if (so->so_proto == 0)
1305 return (EOPNOTSUPP);
1306#ifndef COMPAT_43
6b6e0885 1307 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1308#else
1309 {
1310 int ocmd = cmd;
1311
1312 switch (cmd) {
1313
1314 case SIOCSIFDSTADDR:
1315 case SIOCSIFADDR:
1316 case SIOCSIFBRDADDR:
1317 case SIOCSIFNETMASK:
1318#if BYTE_ORDER != BIG_ENDIAN
1319 if (ifr->ifr_addr.sa_family == 0 &&
1320 ifr->ifr_addr.sa_len < 16) {
1321 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1322 ifr->ifr_addr.sa_len = 16;
1323 }
1324#else
1325 if (ifr->ifr_addr.sa_len == 0)
1326 ifr->ifr_addr.sa_len = 16;
1327#endif
1328 break;
1329
1330 case OSIOCGIFADDR:
1331 cmd = SIOCGIFADDR;
1332 break;
1333
1334 case OSIOCGIFDSTADDR:
1335 cmd = SIOCGIFDSTADDR;
1336 break;
1337
1338 case OSIOCGIFBRDADDR:
1339 cmd = SIOCGIFBRDADDR;
1340 break;
1341
1342 case OSIOCGIFNETMASK:
1343 cmd = SIOCGIFNETMASK;
1344 }
6b6e0885 1345 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1346 switch (ocmd) {
1347
1348 case OSIOCGIFADDR:
1349 case OSIOCGIFDSTADDR:
1350 case OSIOCGIFBRDADDR:
1351 case OSIOCGIFNETMASK:
1352 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1353
1354 }
1355 }
1356#endif /* COMPAT_43 */
1357
1358 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1359#ifdef INET6
1360 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1361 if (ifp->if_flags & IFF_UP) {
4986965b 1362 crit_enter();
984263bc 1363 in6_if_up(ifp);
4986965b 1364 crit_exit();
984263bc
MD
1365 }
1366#endif
1367 }
1368 return (error);
1369
1370 }
1371 return (0);
1372}
1373
1374/*
1375 * Set/clear promiscuous mode on interface ifp based on the truth value
1376 * of pswitch. The calls are reference counted so that only the first
1377 * "on" request actually has an effect, as does the final "off" request.
1378 * Results are undefined if the "off" and "on" requests are not matched.
1379 */
1380int
f23061d4 1381ifpromisc(struct ifnet *ifp, int pswitch)
984263bc
MD
1382{
1383 struct ifreq ifr;
1384 int error;
1385 int oldflags;
1386
1387 oldflags = ifp->if_flags;
46f25451 1388 if (ifp->if_flags & IFF_PPROMISC) {
984263bc
MD
1389 /* Do nothing if device is in permanently promiscuous mode */
1390 ifp->if_pcount += pswitch ? 1 : -1;
1391 return (0);
1392 }
1393 if (pswitch) {
1394 /*
1395 * If the device is not configured up, we cannot put it in
1396 * promiscuous mode.
1397 */
1398 if ((ifp->if_flags & IFF_UP) == 0)
1399 return (ENETDOWN);
1400 if (ifp->if_pcount++ != 0)
1401 return (0);
1402 ifp->if_flags |= IFF_PROMISC;
3e4a09e7
MD
1403 log(LOG_INFO, "%s: promiscuous mode enabled\n",
1404 ifp->if_xname);
984263bc
MD
1405 } else {
1406 if (--ifp->if_pcount > 0)
1407 return (0);
1408 ifp->if_flags &= ~IFF_PROMISC;
3e4a09e7
MD
1409 log(LOG_INFO, "%s: promiscuous mode disabled\n",
1410 ifp->if_xname);
984263bc
MD
1411 }
1412 ifr.ifr_flags = ifp->if_flags;
46f25451 1413 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1414 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1415 (struct ucred *)NULL);
984263bc
MD
1416 if (error == 0)
1417 rt_ifmsg(ifp);
1418 else
1419 ifp->if_flags = oldflags;
1420 return error;
1421}
1422
1423/*
1424 * Return interface configuration
1425 * of system. List may be used
1426 * in later ioctl's (above) to get
1427 * other information.
1428 */
984263bc 1429static int
61b8d551 1430ifconf(u_long cmd, caddr_t data, struct thread *td)
984263bc 1431{
41c20dac
MD
1432 struct ifconf *ifc = (struct ifconf *)data;
1433 struct ifnet *ifp;
1434 struct ifaddr *ifa;
984263bc
MD
1435 struct sockaddr *sa;
1436 struct ifreq ifr, *ifrp;
1437 int space = ifc->ifc_len, error = 0;
1438
1439 ifrp = ifc->ifc_req;
1440 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 1441 int addrs;
984263bc 1442
f23061d4 1443 if (space <= sizeof ifr)
984263bc 1444 break;
623c059e
JS
1445
1446 /*
95f018e8
MD
1447 * Zero the stack declared structure first to prevent
1448 * memory disclosure.
623c059e 1449 */
95f018e8 1450 bzero(&ifr, sizeof(ifr));
3e4a09e7
MD
1451 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1452 >= sizeof(ifr.ifr_name)) {
984263bc
MD
1453 error = ENAMETOOLONG;
1454 break;
984263bc
MD
1455 }
1456
1457 addrs = 0;
984263bc 1458 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
f23061d4 1459 if (space <= sizeof ifr)
984263bc
MD
1460 break;
1461 sa = ifa->ifa_addr;
61b8d551
JH
1462 if (td->td_proc->p_ucred->cr_prison &&
1463 prison_if(td, sa))
984263bc
MD
1464 continue;
1465 addrs++;
1466#ifdef COMPAT_43
1467 if (cmd == OSIOCGIFCONF) {
1468 struct osockaddr *osa =
1469 (struct osockaddr *)&ifr.ifr_addr;
1470 ifr.ifr_addr = *sa;
1471 osa->sa_family = sa->sa_family;
f23061d4 1472 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1473 ifrp++;
1474 } else
1475#endif
1476 if (sa->sa_len <= sizeof(*sa)) {
1477 ifr.ifr_addr = *sa;
f23061d4 1478 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1479 ifrp++;
1480 } else {
f23061d4 1481 if (space < (sizeof ifr) + sa->sa_len -
984263bc
MD
1482 sizeof(*sa))
1483 break;
1484 space -= sa->sa_len - sizeof(*sa);
f23061d4
JH
1485 error = copyout(&ifr, ifrp,
1486 sizeof ifr.ifr_name);
984263bc 1487 if (error == 0)
f23061d4
JH
1488 error = copyout(sa, &ifrp->ifr_addr,
1489 sa->sa_len);
984263bc
MD
1490 ifrp = (struct ifreq *)
1491 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1492 }
1493 if (error)
1494 break;
f23061d4 1495 space -= sizeof ifr;
984263bc
MD
1496 }
1497 if (error)
1498 break;
1499 if (!addrs) {
f23061d4
JH
1500 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
1501 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1502 if (error)
1503 break;
f23061d4 1504 space -= sizeof ifr;
984263bc
MD
1505 ifrp++;
1506 }
1507 }
1508 ifc->ifc_len -= space;
1509 return (error);
1510}
1511
1512/*
1513 * Just like if_promisc(), but for all-multicast-reception mode.
1514 */
1515int
f23061d4 1516if_allmulti(struct ifnet *ifp, int onswitch)
984263bc
MD
1517{
1518 int error = 0;
984263bc
MD
1519 struct ifreq ifr;
1520
4986965b
JS
1521 crit_enter();
1522
984263bc
MD
1523 if (onswitch) {
1524 if (ifp->if_amcount++ == 0) {
1525 ifp->if_flags |= IFF_ALLMULTI;
1526 ifr.ifr_flags = ifp->if_flags;
46f25451 1527 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1528 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1529 (struct ucred *)NULL);
984263bc
MD
1530 }
1531 } else {
1532 if (ifp->if_amcount > 1) {
1533 ifp->if_amcount--;
1534 } else {
1535 ifp->if_amcount = 0;
1536 ifp->if_flags &= ~IFF_ALLMULTI;
1537 ifr.ifr_flags = ifp->if_flags;
46f25451 1538 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1539 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1540 (struct ucred *)NULL);
984263bc
MD
1541 }
1542 }
4986965b
JS
1543
1544 crit_exit();
984263bc
MD
1545
1546 if (error == 0)
1547 rt_ifmsg(ifp);
1548 return error;
1549}
1550
1551/*
1552 * Add a multicast listenership to the interface in question.
1553 * The link layer provides a routine which converts
1554 */
1555int
f23061d4
JH
1556if_addmulti(
1557 struct ifnet *ifp, /* interface to manipulate */
1558 struct sockaddr *sa, /* address to add */
1559 struct ifmultiaddr **retifma)
984263bc
MD
1560{
1561 struct sockaddr *llsa, *dupsa;
4986965b 1562 int error;
984263bc
MD
1563 struct ifmultiaddr *ifma;
1564
1565 /*
1566 * If the matching multicast address already exists
1567 * then don't add a new one, just add a reference
1568 */
1569 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
0c3c561c 1570 if (sa_equal(sa, ifma->ifma_addr)) {
984263bc
MD
1571 ifma->ifma_refcount++;
1572 if (retifma)
1573 *retifma = ifma;
1574 return 0;
1575 }
1576 }
1577
1578 /*
1579 * Give the link layer a chance to accept/reject it, and also
1580 * find out which AF_LINK address this maps to, if it isn't one
1581 * already.
1582 */
1583 if (ifp->if_resolvemulti) {
1584 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1585 if (error) return error;
1586 } else {
1587 llsa = 0;
1588 }
1589
1590 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1591 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1592 bcopy(sa, dupsa, sa->sa_len);
1593
1594 ifma->ifma_addr = dupsa;
1595 ifma->ifma_lladdr = llsa;
1596 ifma->ifma_ifp = ifp;
1597 ifma->ifma_refcount = 1;
1598 ifma->ifma_protospec = 0;
1599 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1600
1601 /*
1602 * Some network interfaces can scan the address list at
1603 * interrupt time; lock them out.
1604 */
4986965b 1605 crit_enter();
984263bc 1606 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
4986965b 1607 crit_exit();
984263bc
MD
1608 *retifma = ifma;
1609
1610 if (llsa != 0) {
1611 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
0c3c561c 1612 if (sa_equal(ifma->ifma_addr, llsa))
984263bc
MD
1613 break;
1614 }
1615 if (ifma) {
1616 ifma->ifma_refcount++;
1617 } else {
1618 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1619 M_IFMADDR, M_WAITOK);
1620 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1621 M_IFMADDR, M_WAITOK);
1622 bcopy(llsa, dupsa, llsa->sa_len);
1623 ifma->ifma_addr = dupsa;
1624 ifma->ifma_ifp = ifp;
1625 ifma->ifma_refcount = 1;
4986965b 1626 crit_enter();
984263bc 1627 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
4986965b 1628 crit_exit();
984263bc
MD
1629 }
1630 }
1631 /*
1632 * We are certain we have added something, so call down to the
1633 * interface to let them know about it.
1634 */
4986965b 1635 crit_enter();
bd4539cc 1636 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL);
4986965b 1637 crit_exit();
984263bc
MD
1638
1639 return 0;
1640}
1641
1642/*
1643 * Remove a reference to a multicast address on this interface. Yell
1644 * if the request does not match an existing membership.
1645 */
1646int
f23061d4 1647if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
984263bc
MD
1648{
1649 struct ifmultiaddr *ifma;
984263bc
MD
1650
1651 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1652 if (sa_equal(sa, ifma->ifma_addr))
984263bc
MD
1653 break;
1654 if (ifma == 0)
1655 return ENOENT;
1656
1657 if (ifma->ifma_refcount > 1) {
1658 ifma->ifma_refcount--;
1659 return 0;
1660 }
1661
1662 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1663 sa = ifma->ifma_lladdr;
4986965b 1664 crit_enter();
984263bc
MD
1665 LIST_REMOVE(ifma, ifma_link);
1666 /*
1667 * Make sure the interface driver is notified
1668 * in the case of a link layer mcast group being left.
1669 */
1670 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0)
bd4539cc 1671 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
4986965b 1672 crit_exit();
984263bc
MD
1673 free(ifma->ifma_addr, M_IFMADDR);
1674 free(ifma, M_IFMADDR);
1675 if (sa == 0)
1676 return 0;
1677
1678 /*
1679 * Now look for the link-layer address which corresponds to
1680 * this network address. It had been squirreled away in
1681 * ifma->ifma_lladdr for this purpose (so we don't have
1682 * to call ifp->if_resolvemulti() again), and we saved that
1683 * value in sa above. If some nasty deleted the
1684 * link-layer address out from underneath us, we can deal because
1685 * the address we stored was is not the same as the one which was
1686 * in the record for the link-layer address. (So we don't complain
1687 * in that case.)
1688 */
1689 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1690 if (sa_equal(sa, ifma->ifma_addr))
984263bc
MD
1691 break;
1692 if (ifma == 0)
1693 return 0;
1694
1695 if (ifma->ifma_refcount > 1) {
1696 ifma->ifma_refcount--;
1697 return 0;
1698 }
1699
4986965b 1700 crit_enter();
984263bc 1701 LIST_REMOVE(ifma, ifma_link);
bd4539cc 1702 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
4986965b 1703 crit_exit();
984263bc
MD
1704 free(ifma->ifma_addr, M_IFMADDR);
1705 free(sa, M_IFMADDR);
1706 free(ifma, M_IFMADDR);
1707
1708 return 0;
1709}
1710
1711/*
1712 * Set the link layer address on an interface.
1713 *
1714 * At this time we only support certain types of interfaces,
1715 * and we don't allow the length of the address to change.
1716 */
1717int
1718if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1719{
1720 struct sockaddr_dl *sdl;
1721 struct ifaddr *ifa;
1722 struct ifreq ifr;
1723
f2682cb9 1724 sdl = IF_LLSOCKADDR(ifp);
984263bc
MD
1725 if (sdl == NULL)
1726 return (EINVAL);
1727 if (len != sdl->sdl_alen) /* don't allow length to change */
1728 return (EINVAL);
1729 switch (ifp->if_type) {
1730 case IFT_ETHER: /* these types use struct arpcom */
1731 case IFT_FDDI:
1732 case IFT_XETHER:
1733 case IFT_ISO88025:
1734 case IFT_L2VLAN:
1735 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1736 /* FALLTHROUGH */
1737 case IFT_ARCNET:
1738 bcopy(lladdr, LLADDR(sdl), len);
1739 break;
1740 default:
1741 return (ENODEV);
1742 }
1743 /*
1744 * If the interface is already up, we need
1745 * to re-init it in order to reprogram its
1746 * address filter.
1747 */
1748 if ((ifp->if_flags & IFF_UP) != 0) {
1749 ifp->if_flags &= ~IFF_UP;
1750 ifr.ifr_flags = ifp->if_flags;
46f25451 1751 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1752 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1753 (struct ucred *)NULL);
984263bc
MD
1754 ifp->if_flags |= IFF_UP;
1755 ifr.ifr_flags = ifp->if_flags;
46f25451 1756 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1757 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1758 (struct ucred *)NULL);
984263bc
MD
1759#ifdef INET
1760 /*
1761 * Also send gratuitous ARPs to notify other nodes about
1762 * the address change.
1763 */
1764 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1765 if (ifa->ifa_addr != NULL &&
1766 ifa->ifa_addr->sa_family == AF_INET)
1767 arp_ifinit(ifp, ifa);
1768 }
1769#endif
1770 }
1771 return (0);
1772}
1773
1774struct ifmultiaddr *
f23061d4 1775ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
984263bc
MD
1776{
1777 struct ifmultiaddr *ifma;
1778
1779 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1780 if (sa_equal(ifma->ifma_addr, sa))
984263bc
MD
1781 break;
1782
1783 return ifma;
1784}
1785
1550dfd9
MD
1786/*
1787 * The name argument must be a pointer to storage which will last as
1788 * long as the interface does. For physical devices, the result of
1789 * device_get_name(dev) is a good choice and for pseudo-devices a
1790 * static string works well.
1791 */
1792void
1793if_initname(struct ifnet *ifp, const char *name, int unit)
1794{
3e4a09e7
MD
1795 ifp->if_dname = name;
1796 ifp->if_dunit = unit;
1550dfd9
MD
1797 if (unit != IF_DUNIT_NONE)
1798 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
1799 else
1800 strlcpy(ifp->if_xname, name, IFNAMSIZ);
1801}
1802
984263bc
MD
1803int
1804if_printf(struct ifnet *ifp, const char *fmt, ...)
1805{
e2565a42 1806 __va_list ap;
984263bc
MD
1807 int retval;
1808
3e4a09e7 1809 retval = printf("%s: ", ifp->if_xname);
e2565a42 1810 __va_start(ap, fmt);
984263bc 1811 retval += vprintf(fmt, ap);
e2565a42 1812 __va_end(ap);
984263bc
MD
1813 return (retval);
1814}
1815
1816SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
1817SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
e3e4574a 1818
b2f93efe
JS
1819void
1820ifq_set_classic(struct ifaltq *ifq)
1821{
1822 ifq->altq_enqueue = ifq_classic_enqueue;
1823 ifq->altq_dequeue = ifq_classic_dequeue;
1824 ifq->altq_request = ifq_classic_request;
1825}
1826
e3e4574a
JS
1827static int
1828ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m,
1829 struct altq_pktattr *pa __unused)
1830{
e9cb6d99 1831 crit_enter();
e3e4574a
JS
1832 if (IF_QFULL(ifq)) {
1833 m_freem(m);
e9cb6d99 1834 crit_exit();
e3e4574a
JS
1835 return(ENOBUFS);
1836 } else {
1837 IF_ENQUEUE(ifq, m);
e9cb6d99 1838 crit_exit();
e3e4574a
JS
1839 return(0);
1840 }
1841}
1842
1843static struct mbuf *
d2c71fa0 1844ifq_classic_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op)
e3e4574a
JS
1845{
1846 struct mbuf *m;
1847
e9cb6d99 1848 crit_enter();
e3e4574a
JS
1849 switch (op) {
1850 case ALTDQ_POLL:
1851 IF_POLL(ifq, m);
1852 break;
1853 case ALTDQ_REMOVE:
1854 IF_DEQUEUE(ifq, m);
1855 break;
1856 default:
1857 panic("unsupported ALTQ dequeue op: %d", op);
1858 }
e9cb6d99 1859 crit_exit();
d2c71fa0 1860 KKASSERT(mpolled == NULL || mpolled == m);
e3e4574a
JS
1861 return(m);
1862}
1863
1864static int
1865ifq_classic_request(struct ifaltq *ifq, int req, void *arg)
1866{
e9cb6d99 1867 crit_enter();
e3e4574a
JS
1868 switch (req) {
1869 case ALTRQ_PURGE:
1870 IF_DRAIN(ifq);
1871 break;
1872 default:
1873 panic("unspported ALTQ request: %d", req);
1874 }
e9cb6d99 1875 crit_exit();
e3e4574a
JS
1876 return(0);
1877}
e9cb6d99 1878